Question

Arrange the following in the increasing order of their atomicity:
Ozone, Carbon monoxide, and Ammonia

• A. Ammonia < Ozone < Carbon monoxide
• B. Ozone < Ammonia < Carbon monoxide
• C. Ozone < Carbon monoxide < Ammonia
• D. Carbon monoxide < Ozone < Ammonia

Answer 1

The correct option is D Carbon monoxide < Ozone < Ammonia

The atomicity of a molecule is the total number of atoms present in it. The molecular formula of ozone, carbon monoxide, and ammonia are $O_3$ , $\mathrm{CO}$, and ${\mathrm{NH}}_3$ respectively. Hence, the atomicity of ozone, carbon monoxide, and ammonia are 3, 2, and 4 respectively.
So, the increasing order of atomicity is:
Carbon monoxide < Ozone < Ammonia